function Header(el)
  if el.level >= 2 then
    el.level = el.level - 1
  end
  return el
end



-- 这是行注释 删除所有的图片标签

function Image(el)
  if el.alt and el.alt ~= "" then
    return pandoc.Str("[Image: " .. el.alt .. "]")
  else
    return {}
  end
end
